EP 2273686 A3 20110622 - Communication device
Title (en)
Communication device
Title (de)
Nachrichtengerät
Title (fr)
Dispositif de communications
Publication
Application
Priority
- EP 04251002 A 20040224
- JP 2003048091 A 20030225
Abstract (en)
[origin: EP1453214A2] A communication device able to reliably find a frequency and able to reliably establish synchronization of frequency even if an oscillation frequency of an oscillator changes and able to continuously hold synchronization of a carrier, wherein an acquisition unit uses a certain timewise stable area for a frequency search of a satellite so as to reliably find the frequency of the satellite, receives a frequency change of a reference signal from a control unit, performs a frequency search of the satellite at the frequency before the frequency change of the reference signal after the frequency change of the reference signal, uses two or more clock stable areas for the frequency search of the satellite to thereby make it possible to perform the frequency search of the satellite over a long time, and transmits a change to a tracking unit to establish synchronization of the frequency of the satellite where the frequency of the reference signal changes after the frequency search of the satellite. <IMAGE>
IPC 8 full level
H04B 1/38 (2006.01); G01S 1/00 (2006.01); G01S 19/25 (2010.01); G01S 19/29 (2010.01); H04B 1/707 (2011.01); H04B 1/7073 (2011.01); H04L 7/04 (2006.01); H04L 7/08 (2006.01); H04M 1/02 (2006.01)
CPC (source: EP US)
G01S 19/235 (2013.01 - EP US); G01S 19/29 (2013.01 - EP US); H04B 1/7085 (2013.01 - EP US); H04B 1/7087 (2013.01 - EP US); H04B 2201/70715 (2013.01 - EP US)
Citation (search report)
[A] WO 8701540 A1 19870312 - MOTOROLA INC [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1453214 A2 20040901; EP 1453214 A3 20050209; EP 2273686 A2 20110112; EP 2273686 A3 20110622; JP 2004260478 A 20040916; JP 3738766 B2 20060125; US 2005008066 A1 20050113; US 7333533 B2 20080219
DOCDB simple family (application)
EP 04251002 A 20040224; EP 10010728 A 20040224; JP 2003048091 A 20030225; US 78450204 A 20040223